Rolling metal



Y `April 19, 1927.

N. w. ELLloTT ARomana, upm.

Fiied Aug. 1'?. 125

MNNK

(1blu-mq Pumas Api. 19.1927.

. over t UNITED l STATES nom mannen, or :nrw usaran, summum v nonni' c im an.

appunti am ma i1, im.' semi n. mais.

This invention relates to chain drives for rollin mills and comprises allimprovements e prior art which are disclosed in this application, and es ailly relates' :to the driving4 of striv mills or sheet -mills in tandem. It a producing metal strips or sheets.

One object is to rovide a drive for rollin mills which wil eliminate the objectionable wavy finish in the rolled product which .results from the chatter in a gear and shaft driven mill. Another object is to rovide` a semi-elastic drive that protects tlie entire .mechanism from the shoclg's inherent in metal rolling operations.

Other objects are to provide a drive whichwill be` positive, have high mechanical efficiency with a minimum of friction and wear and which will be substantially nonstretchin The a ve mi other objeta which wiii hereinafter pear, irre attained by improvements em yin new and useful features as disclosed in t 's application. To enable others skilled in the art to fully-comprehend the essential features of the rovements, drawings illustrating a prefe form have been annexed as ai part of this disclosure.

Fi lis a lan view of a rolling'mill provider? with die chain drive.

Fig. 2 is an elevational view of Fig. 1. Fi 3 is a perspective view of a portion of sentchain. v

Fig. 4 is a roller chain.

The tion which is herein disclosed for illustrative urposes, comprises successive sta-nds 1, 1 ving pairs of rolls 2, 2 driven by wabblers perspective view of a portion of 3, 3 airs of gears 4, 4. The lower gears l4anscoxinectedhycouplings l5,5 to .6 7havingsproclmtesecured thereto. Sproclrets 8,*9 are secured to shaft 6 while sp ofirs extending ov gagement wi `sprockets 48, 10 is ai chain 13, preferably a rollerehain of well known form such for example as is illustrated in Fig. 4.

If it is desired to have a third. stand of rolls (not shown), as indicated by dotted guns in Fig; 1 a sprocket 11 secured on shaft may be connected preferably by roller chain with a sprocket on msliaft connected to such a third stand of rolls.

relates to methods of articular embodiment of. the invem rocket 10 is securedto shaft 7. In-l tennediate sprockets 8, 10 is an idler 12, and idler 12 and in drivin 'exi-v Ad'acent to shaft 6 is a shaft 15 having sproc ets 16, 17 lsecured thereto, and connectin the smallers rocket 16 on shaft 15 with t e larger sproc et 9 on shaft 6 is refel-ably a roller cha'in 18. Adjacent s aft is an electric motor 19 having a small sprocket 20. secured on its shaft 21 and connected with silent chainl 22 of well known form such for exam le as is illustrated in Fig. 3.' The Vspree ets -and 17 connected by the silent ain are usually of true spur ear form as is well known.` Owing to the re atively high speed at which shaft 21 rotates, and therefore the high at which cliain 22 travels, it1 is prefere e to use a ysilent chain here.

sprocket 17 preferably by a4 But chains 18v and 13 which areslower.I

traveling need not be silent chains since roller chains serve' satisfactorily for this purpose.

By using well made chains and sprockets, a substantially noiseless drive is provided `which is positive and free from back lash and which is semi-elastic thereby protecting the entire mechanism' from the shocks inhent in metal rolling operations. This results in a drive that causes the mill to run4 smoothly without chatter, which chatter in the drives in common use cause Lan objectionable wavy4 inish'in the rolled product. This .wavy iimsh occurs to a certain extent in hot rolled stri and sheet, but ismuch more ronoun in cold rolled strip and sheet ue to the higher stresses occurrin in cold rolling, and 1t is more objectiona le since the uired quality of commercial cold rolled ish is Vmuch higher than in the case vof hot But with the chain drive a smooth quality finish is' consistently and continuously reduced, which is free from all -wavy Without' further elaboration, this disclo;

sure 'will so fully reveal the gist of the iniprovements that others canb applying cur- !rent knowledge, readily varyythese improvements without omitting certain features that,

from the standpoint of the prior art, fairly Yconstitute essential4 characteristics of the generic and specific spe'cts of these improvementsi and therefore such variations are intende to be co reliended within the meaning and rangen equivalency of the followin l I claim:

1. A miiing mili mi mi' "D5 f iumii of successively arranged stnde o sprrotcyket means of successivero stan `high speed'. tary power source provided with a 4priiuu'yj sprocket,

and-chain and sprocket speed reduction glear'f said primary s rocket wit one said rolls inclnding asi ent chain connected to said primarygsprocket connection with oiieff with saiv sa'id rollsand a silent chain connecting said two last mentioned sprockets. -A rolling mill com rising a plurality of successively arrange sands. of-rolls, sprocket means coaxial with and havingA a driving connectionwith on'V roll in each roll stand, chain means connecting the sprocket means of successive roll' stands, a' power. sourcehand4 chain and spizoclxetspeed reduction gearing connecting said power with one aof saidrolls. j

344A rollin' mill ,icom rising 'a ',pliira 'ty of 'successive y ari-an e stands of ro'ls, spocket means coaxia with and `having a drivingY `imeoiion with one ro11` in each roll stand;' chain means connecting the sprocket means of successive roll stands, and a power source connectedsto one of said rolls by chain and sprocket means.

ving chain means connecting said sprock- AIi. 4A' rolling, millfomprising a sfan'd of rols, a power source, and chain and sprocket driving cans connecting saidstand of rolls power source. 6. The metho'd of producing a rolled strip or' sheet 'of` metal driving a standoff rolls positively by a chain and Vsprocket, and simultaneously passing said strip or sheet therehrough whereby the resultant rolled strip issmooth and free of wavy finish.

7. The'method of producing -a rolled strip or sheet of metal comprising the st s of driving a'plurality of successively arranged stands oi' rolls positively by chain 'Land sprocket connecion between a power source and one set of rolls and'chain and sprocket connection between successive stands of rolls, and simultaneously passing said strip or `sheet therethrough whex'eb the resultant rolled strip is smooth an free of wavy finish. v

NOAH W. ELLIOTT.

`comprising the steps ofV means tcoaxial withand having a driving connection `with fone roll in each roll stand, roller chain means conectin the s rocket xstangs, a reEitively high speed rotary power source provided with a primary sprocket, and chain and sprocket speed reduction caring connecling said primary sprocket wit 1 one f said rolls, including a silent chain connected to said primary sprocket connection with one .0f said rollsland a silent chain connecting said two last mentioned spr'o'ckets. e 25 A rolling mill comprising a plurality of successively arranged' sands offy rolls, sprocket means coaxial with and having a driving connectionwith one roll in each roll stand, chain means connecting the sprocket means of successive roll stands, a power source, and chain and sprccketspeed reduction gearing connecting said power source with one lof said rolls.

3. A rolling mill comprising a`pl`urality ofsuccessively arranged stands of rolls, sprocket means coaxial with and having a driving connection with one roll in each roll stand; chain means connecting the sprocket means of successive roll stands, and a power source connect-edt()4 one of said rolls by chain and sprocket means.

4. A rolling mill comprising a stand of rolls, a sprocket coaxial with and having a driving connection with one of said rolls, a gower source providedyvith a sprocket, and

living chain means connecting said sprock- `ets.V A A5. A rolling mill comprising a sand of rolls, a power source, and chain and sprocket drivlngrneans connecting saidstand ofrolls with said power source.

.stands o` rolls positively by chain and 6u sprocket connecfion between a power source and 4one set of rolls and`chain and sprocket connection between successive stands of rolls, and simultaneously passing said strip or sheet therethrough Wher'eb7 the resultant 55 rolled strip is smooth an free of wavy finish.

NOAH W. ELLIOTT.

CERTIFICATE 0F CGRRECTIGN.

Patent No. 1,625. 643.

Granted April 19, 1927, to

Nomi w. ELLIOTT.

lt ie hereby certified that error appears .in the printed specification of the above numbered patent requiring correction as follows: Page 2, lines l0 to l2, claim i, strike out the words "connection with one of said rolls and a silent chain connecting said two last mentioned sprockets"; and that the said Letters `Patent ahoni-d' be read with this eorrection therein that the same may conform le the record of the'case in thePatent Qffice.l

'signed ma sealed uns 10u ny ofuay, A. n. 1921.

eal.

1 il.' J. Moore. `Acting Gomieaioner -of Patente.

CERTIFICATE 0F CORRECTION;

Patent No. 1,625,643. Granted April 19. 1927, to

NOAH W. EELOTT.

lt is hereby certified that error appears .in the printed specification ol the above numbered patent requiring correction as follows: Page 2, lines l0 to l2, claim i, strikout the words "connection with one of said rolls and a silent chain connecting said two last mentioned sprockets"; and that the said Lettera Patent shoul-d'be read with this correction therein that the same may conform to the record of the`ease in thefPatent Offiee.l

Sitned and 4sealed this 10th day of'May, A. D. 1927.

il; J. Moore. Seal. 'Acting Commissioner of Patents. 

